Halloween Horror Nights -- 'The Walking Dead'

Greg Nicotero, co-executive producer of 'The Walking Dead' television show, jokingly holds back zombies behind a door in the haunted house dedicated to the show in Universal's Halloween Horror Nights.

Greg Nicotero, co-executive producer of 'The Walking Dead' television show, jokingly holds back zombies behind a door in the haunted house dedicated to the show in Universal's Halloween Horror Nights. (Dewayne Bevil, Orlando Sentinel)

Greg Nicotero, co-executive producer of 'The Walking Dead' television show, jokingly holds back zombies behind a door in the haunted house dedicated to the show in Universal's Halloween Horror Nights.